Gas-burner.



No. 757,651. PATBNTED 111111.19, 1904.

GAS BURNER.

APPLICATION FILED JULY 16, 1903.

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. l mmmmmm I l IIIIIl-glllllllll ru 4 I [NVE/WOR UNITED STATES Patented April 19, 1904,

FATENT erica.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 757,651, dated April 19, 1904.

Application filed July l5, 1903. Serial No. 165,586. (No model.)

To all whrmt it may concern:

Be it known that I, OLIVER D. CORNELL, a citizen of the United States, and a resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Gas-Burners, of which the following is a specification.

T he invention relates to gas burners or means for controlling the fluid, and more particularly to a device arranged to have certain automatic action dependent upon the flow of the fluid through the apparatus and directly dependent upon the temperature induced by said fluid.

rlChe object of the invention is to provide a simple and compact device which may be readily applied to an ordinary illuminating-gas burner and which will whenever the supply of gas is out off momentarily or the flame otherwise extinguished react to cut off the flow of gas or other liuid.

Afurther object of the invention is to provide an automatic cut-off for burners which will act under varying conditions of tempera'- ture induced by the gas ignited at the burner.

A still further object is to provide an arrangement which applied to an ordinary gas burner or tip will not deflect or interfere with the light or cast unpleasant shadows; and a still further object is to provide in such a device a means for opening and holding open a supply-valve, at the same time throwing the parts automatically into position to be released upon a predetermineddecrease in temperature due to the reduction of the flame.

Referring to the drawings, Figure l is a view in side elevation of the improved burner. Fig. 2 is a plan view of the parts shown in Fig. l. Fig. 3 is an end view looking from the right of Fig. l. Fig. a is a detail view of the trip mechanism. Fig. 5 is a detail view of the end of thevalve-lever. Fig. 6 is a detail view of the controlling-lever.

In the accompanying drawings the letter a denotes a burner-tube of ordinary construction having at or near its base a valve Z1, which may be of any desired pattern and is held normally in closed position by a reactive spring Mounted upon the spindle of this valve is a lever c, having a projecting arm c',

to which is connected a chain d. A pin CZ and segmental slot @Z2 determinethe movement of the leve-r and valve-stem.

Suitably mounted upon the burner-tube and secured thereto, as by a screw or other suitable clamp, is a base-piece c, having secured at one end a support c' for a thermostat-ic bar f. This bar f' is of peculiar shape, having a main body portion f and a projecting ear f 2, thus making a most sensitive bar and one which will vary with slight degrees in changes of temperature. 'This thermostatic bar has at,

the opposite end from its support a dependent connection g, which `vlies in the forked end of a lever L, pivoted to the frame, as at fr', and lying in a depressed portion of the base 72,2. rlhe end of this lever is beveled on its inner face and normally projects against the surface of a spring-pressed pin 7c. The lever c at its upper end is of blade shape and normally lies between the lever and the basepiece. Vhen the gas is turned on, the chain, heretofore described, is pulled downward, drawing the lever c back until the blade-shaped 'edge rests against the surface of the springpressed pin. In this position the valve is positively held open, and when the gas is ignited the heat expands the thermostatic bar and presses the end of the lever /L inward against the pin, moving it forward out of en.- gagement with the blade-shaped edge of the valve-lever. The valve-lever now comes into Contact with the eXtreme end of the lever i and rests there until the gontraction of the thermostatic har reacts 'upon the lever and permits the valve-lever c to be thrown forward to the cut-off position by its spring.

It is to be noted that the projecting portion of the thermostatic bar is bent forward slightly over the jet of the frame in order tov `llame is extinguished, in all of these devices the llame must be run at practically full force in order to keep the parts in position with the valve open. In the device herein described the thermostatic bar is so arranged and IOO formed that comparatively little heat from the burner-tube will be properly transmitted to hold the valve open, and yet the device is most sensitive to changes of temperature, and the delicacy, while entirely practical,V with which the valve-leveris held in open position permits and compels closing of the valve within an extremely short space of time after the flame, be it ever so small, is extinguished. Obviously the thermostatic bar might be arranged in various different manners, and, in fact, the several parts of the mechanism might be varied as to details and arrangement without materially departing from the spirit or intent of the invention, and obviously any desired material might be used for a thermostatic bar-as, for instance, aluminium, German silver, or two metals combined-although it is. desirable to use metals having a high coefficient of expansion and contraction. By having the thermostatic bar formed with a projecting portion practically overlying the jet from the burner the bar simply takes up its heat and just as simply radiates it, aided by the iow of fluid after the flame is extinguished and until the bar has reacted to close the valve.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In combination with a burner, a valve, a spring for closing the valve, a valve-lever for controlling the movements of the valve, a reciprocating pin forming a positive stop for the valve-lever in one position, a thermostatic bar operatively arranged with relation to the burner, and means intermediate said thermostatic bar and pin for moving the latter and permitting the engagement of the lever and the pin-moving means.

2. In combination with a burner, a thermostatic bar operatively arranged with relation to the burner, a valve and a valve-lever for controlling the movements of the valve, a spring for normally holding the valve in a closed position, a trip-lever connected at one end to the thermostatic bar and actuated thereby and having its opposite end arranged ad jacent to a stop-pin, a stop-pin `for positively holding the valve-lever in open position and arranged to release the valve-lever and throw it into direct contact with its cooperating lever upon predetermined movements of the thermostatic bar.

3. In combination with a burner, avalve for controlling the flow of fluid to the burner, a lever for actuating said valve, the latter normally held in closed position by a spring, the lever-spring, a positive stop for locking the valve-lever with the valve in open position and automatic means including a thermostatic bar for releasing the lever from the positive stop and afterward controlling its movements dependent upon the temperature of the thery mostatic bar.

thermostatic bar for controlling the closing movements of the valve, said bar arranged adjacent to the ilame of the burner and having centrally arranged thereon a projecting part for conducting heat to the bar and radiating heat therefrom.

5. In combination with a burner, a valve for controlling the flow of fluid to the burner, a valve-lever for actuating the valve, a basepiece secured to the tube and having a depressed portion at one end, a lever pivoted in said depressed portion and bearing at one side against a resilient projection on the base-piece and having its end adapted for free engagement with the valve-lever.

6. In combination with a burner, a valve controlling the flow of liuid through the burner, a lever for actuating said valve, a resilient stop for positively locking the valvelever and valve in open position, and automatic means including an expanding thermostatic member for moving said resilient `stop and releasing the valve member for engagement therewith whereby said lever will assume a position adjacent to the stop-actuating means and will be released from said position by the contractile movement of the thermostatic member.

7. In combination with a burner, having a valve for controlling the How of fluid to the burner, a valve-lever for actuating said valve, a spring for normally holding the valve in closed position, a thermostatic bar, a springactuated pin arranged to form a positive stop to hold the valve-lever with the valve in open position said valve-lever resting against the periphery of the pin, a trip-lever connected at one end to the thermostatic bar and actuated thereby and having its end arranged to contact with the end of the stop-pin whereby an expansive movement of the thermostatic bar depresses the pin and releases the valve-lever to a position at the end of the pin and adjacent to the contacting portion of the trip-lever and upon a contractile movement of said bar will release said lever for a closing movement.

8. In combination with a burner having a valve for controlling the flow of fluid through the burner, a valve-lever for actuating said valve provided with a blade-like end, a springpressed stop, actuating means for said stop including a thermostatic bar and a lever the latter provided with a cam-surface adjacent to the stop whereby the valve-lever may be freely moved between the stop and its engaging lever in one direction and will engage the resilient stop and be released therefrom for engagement with its actuating means dependent upon the action of the thermostatic bar.

OLIVER D. CORNELL.

Witnesses:

E. P. COFFRIN, WM. H. BARKER.

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